Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Protobranchia Pelseneer, 1889
       Order Nuculida Dall, 1889
         Superfamily Nuculanoidea Adams & Adams, 1858 (1854)
           Family Nuculanidae Adams & Adams, 1858 (1854) - pointed nut clams
             1 Subfamily Ledellinae Allen & Sanders, 1982
             2 Subfamily Nuculaninae Adams & Adams, 1858 (1854)